Gas-engine.



F. L. GROSS,

GAS ENGINE.

APPLICATION FILED FEB. 24, 1908.

1,046,738. Patented Dec.10,1912.

.the passagej leading from the eom'pressionv space of the cylinder to the compression chamber. .With this construction the valve which opens and closes. the portmaybe ac-. 'curately timed to open the port during the required proportion of the compression.

stroke of the piston, and thespe'ed of the.

-engine may' be effectively 'and properly regulated by operating the throttling valve to offer a reater or less resistance to the.

the charge while-the port is open; The. throttling valve orjother means for' regulating the" escape-of the charge may be either manually or automatically perated according to the conditions under which the engine is to be run. For'instance','1n case vthe engine is to be utilized in driving an'a-u tomobile' or other motor vehicle, the throt-itling valve or other regulating device may Y 2 be manually operated'to vary the speed of the engineas desired. On-the' other hand,-

if the engine is to be utilized where a-constant speed is required under "varying loads, the throttling valve or other regulat ng de-; vice. may be readily operated by, any com-" mon form of governingjdevice In "any case,

a v full charge of motive fluidis'; supplied "to;

the cylinder atthe end 01f eaehf' tQrWard stroke; of the piston, so that -the' presence 3 of a proper mixture ini the ,compressiim;-

space of the" cylinderis insured bothfwhexi" 1 running under full load and atnfull 'speed' 'and when running'under lightffloa'dsfor slow speeds. The various tion oftheaccompanying drawing, in which .=the figure shown is a vertical centralsection illustrating an engine embodying the; various features ofthe. invention mthe forms-in which I prefer to use them. h

' In the form of engine shown in the draw-l ing, the piston 1 is mounted in the cylinder 2, and is connected by means of a connecting rod 3'with a crank 4: which is-forined 'onthe crank shaft 5. A crank chamber 6 comjmunicates with the lower end of thepylin-X ",der, and forms the chamber in which the charge is compressed sufiioieptly to displace I so the products of combustion when the supply port 7 is opened by the forward stroke For the purpose of. controlling the speed of the. engine while allowing a full charge to be supplied to the compression space 12 v of the. cylinder under-allconditions', apassage or bypass 13 is lpr'ovided which com-o munieates with the. compression .sp'ace,- -.o ff es-the cylinder through a; port 1 andteom-i some 7' at rei gh ar ef f oil 'g aybe- -automat-ically operated through any features of the 1 invention will be readily understoodfrom-an.inspec-v municates with 'thespreliminary w s. f

sionchamber through the passage 8. The

communication :between the bypass and the .compressionspace of the cylinder is controlled-bylja valve 15 which is held to' it's seat by a spring 16, and normally cuts oif communication between the compression This valve is open during-a fixed proportion of thecompression-stroke of the pisof'which is arranged to 'engage a collar 18 'space'of the cy'Iind'erand-V the bypass 13.

. '75 ton by means: of a lever 17, the upper end j secured to'the outer'e'nd of the valve stem 7 '19, and the lower end-'ofwhich carries a roll arranged" to be-engaged by a cam 20. The

cam 20 is secured to a.'shaft2'1 which is connected with the crank shaft5 "through gears 22, so that it makes one revolution for each revolution of the "crank shaft, and 'acts to open the-valve 15- for a .figed part" ofthe upward stroke of'the piston. 1- The fiow of motive-fluid throughIthe bypass l3 during the time that'the'valve, lfifaiid port. 14' are ,open is controlledjjbyafthrottle "valve 23- W ichmay"befioperated to allow a free flow an arm 24f whi'ch may be manual y Iiolfierated gs'uitable governing m'eehanism.- e -1 n'runningunder' full load and at full ,of'the motiveffluidotlirough thebypass, or 1 tdigthrottlethef flow: to' any desired extent. if. l-histhrottlin'gjfvalve operated through o speed, the throttling valve-23 may be in position to .'close the bypass- 13, -'and in. such Qcase the eharge applied to'the' compress'iOn sPaceY-Of the 'cylinder' -will be com- ";pressed and; exploded, and the. engine will operate"mj-theisame-manner that it would if the valvejl5, bypass 13,'-"'aiid throttling valve 23, were notrpresent. casethe; en-

=gine is manuali'y; controlled ,ja nd it'tis desired' t'oislow 'down 'the speed; the rod 25 may'be operated to turn the throttle valve 23 into position to partially open the bypass 13. -In such case, a p'art of the charge the compression space 12 will flow through the-bypass '13 into the. compression.

chamber 6 during" the time that I the valve 15 is open, and -a-smaller charge-than. nor-' mal will be compressed'andexploded, thus causing a reduction in the speed of the engine. The proportion of the-charge which is thus allowedto escape during the compression stroke of the vpiston may be con veniently andetfectively regulated by vary-'- ing the position of the throttling valve so that it will, throttlethe flow of fluid through" I the bypass to a; greater or less extent, andthus thefspeed of the engine may be 'efi'e'c- 'tively andaccurately controlled. The

to regulate the proportion-Tot}: the hargej which escapes from thecylinderfduring the compression strok'eiof the pistoni 11"ea'se ,it

throttling valve may .be similarly operated is desired to maintain the engine at a con stant speed under varying loads, and the valve may be thusoperated either manually or automatically. V

While I prefer to embody the features of the inventionin substantially the form and arrangement indicated in the drawing, it will be understood that the specific construction and arrangement of the parts is not essential to the broader features of the invention. The term preliminary compression chamber used in the specification and claims is intended to refer to any chamber or space in which a pressure is either maintained or produced requisite to the proper 1 supply of the motive fluid to the compression through the port during the time that it is open'independently of the extent to which space of the-cylinder when the supply port 1s open.

Having explained the nature and object of the invention, and described one form ofv engine in which the invention may be embodied, what I claim is 1. A 2-cycle engine, having, in combinati on, a cylinder, a pistommeans for supplying a full charge of motivefluid to the. cylinder at the end of each forward stroke of "the piston, a port open to the combustion chamber of the c linder during a part of the compression .stro e ofthe piston, and means for regulating the escape of motive fluid it is open, substantially as described.

' 2. A 2-cycle engine, having, in combination, a cylinder, a piston, a preliminary coin:

pression chamber, a passage communicating with the combustion chamber of the cylinder and with the compression chamber, means for opening said passage to the combustion chamber of the cylinder during a part of the compression stroke of the piston, and means independent of the last mentioned means for regulating the escape, of the motive fluid through said passage while it is in communication with the combustion chamber of the cylinder, substantially as de-;

scribed.

3. A 2 -cycle engine, having, in combination, a cylinder, a piston, means for supplyinga full charge of motive fluid to the, cylinder at each forward strokeof the piston, a

port communicating with the combustion chamber of the cylinder, a. valve for opening and closing the port, means for opening the tween the cylinder an valve operating during the compression stroke of the piston, and means for regulating the escape of the motive fluid through the port independently of the extent to which. the valve is open, substantially as described. a

4. A 2-cycle engine, having, in combination, a cylinder, a piston, a preliminary compression chamber, a bypass leading from the combustion chamber of the cylinder to the preliminary compression chamber, a' valve for opening and closing, communication be-@ tween the bypass and cylinder, means for opening said valve to a constant extent durof fluid through said passage, substantially 6., A 2-cycle engine, having, in combination, a cylinder, a piston, a passage communicat-ing withthe combustion chamber of the cylinder, a valve for opening and closing communication between the passage and cylinder during the compression stroke ofthe piston, and an independent throttling valve in the passage, substantially as described.

' 7 A 2-cycle engine, having, in combination, a cylinder, a piston, means forsupplya full charge of motive fluid-to the cylin er at the end of each forward stroke of the piston, a port communicating with the.

combustion chamber of the cylinder, a valve for opening said port during the compression stroke of the piston, and an independently operated throttle valve for regulating the escape of motive fluid through the port during the time that it is open, substantlally as described.

In testimony whereof I aflix mysignature, in presence .of two witnesses. FRANK L. CROSS. Witnesses: v

Crmams W.- McDERMo rr, IRA L. Frsn. 

